Please, Do tell.
What is (are) the "BIG difference(s)" between them?
As I said, I have both. I actually use both.
After over ten years of using them side by side, I can find NO real differences; other than the color of the Delrin and the tang stamp ... Oh! And my Taylor Made in China Old Timer 7OT holds an edge a little better than my US made 7OT.
Where to begin...
Not comparing below or above standards for either side, because that can even out or greatly separate individual examples and give a false reading of both brands on the overall level.
In direct comparison to the average USA schrades the taylors generally have thicker and more blocky handles, are thicker behind the edge, have less precise grinds, wonky looking finishes, blades that have more metal taken off from spine to edge giving them a more narrow appearance and less longevity, mushy walk and talk and or rough actions, sharper corners on handles and blades, washed out handle colors, and to top it off they don't have schrades wonderfully executed 1095.
If we are going to talk about edge retention let me ask you this, how did you base your edge retention comparison? If one just cuts some random stuff and one knife beat the other that is not an accurate result. There's no way to remove all the random factors that would drastically effect the results by doing random cutting with no controls. As far as edge retention goes steel is far less important than the edge geometry, but that is a separate subject. Back to schrade.
Now, I am NOT saying taylors are bad knives in their own right but if you want to compare their standard of measure to the real schrade standard standard of measure taylor doesn't stack up. We're also not even comparing the old schrades, which blow the later schrades away. I have hundreds of usa schrade knives, I feel confident saying that I know schrade and what they put out fairly well. They were among the best as a matter of fact, which is why I collect them. They have stood the test of time and are more well known than most any other knife brand because they are dang good.
If the taylor knives didn't have the schrade name on them they would just be a puny footnote in the long list of knife manufacturers.